LinkIt 2523 HDK v11 User's Guide
© 2015 - 2016 MediaTek Inc.
Page 59 of 82
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Figure 38. CONNECTIVITY_BT_MT2523G
GNSS_VBAT
R5243
R / 0 / ohm / 0402 / NC
1
2
Note: 52-18
R5224
R / 0 / ohm / 0603
1
2
GNSS_VBAT
VBAT
Note: 52-8
Note: 52-14
External buck 3.3V LDO
Note 52-18:GPS HOT re-start feature
No support:
BAT5201=NC, R5211=NC, R5243=NC, R5234=0ohm
Support:
Support and Power optimization
X5204=NC, C5222=NC, C5221=NC, R5210=120K, R5220=91K
BAT5201=NC, R5211=NC, R5243=0ohm, R5234=NC
X5204=NC, C5222=NC, C5221=NC, R5210=120K, R5220=91K
BAT5201=ML621S, R5211=1K, R5243=NC, R5234=0 ohm
X5204=FC-135, C5222=22pF, C5221=22pF, R5210=NC, R5220=NC
GNSS_VBAT for pin GPS_VRTC_4V3 should be provided between 2.0V to 4.3V.
GPS_VDDIO
Carkit_input
SC
K1
Title
Size
Date:
Sheet
of
MediaTek HDK MT2523G
52_CONNECTIVITY_GPS_MT3333
C
52
99
Monday , May 30, 2016
JDI
JCK
JMS
JRST
GPS_VTLDO_2V8
SC
S1
External buck 3.3V LDO
VGPS_MAIN
GPS_VR
T
C
_1V1
JDO
GPS_DCV
GPS_VREF
GPS_VTCXO_SW
GPS_DCV_FB
JRCK
GPS_VTCXO_SW
GPS_VTCXO_SW
50 Ohm
VGPS_MAIN
GPS_R
T
C
_XOU
T
GPS_R
F
IN
TCXO
GPS_R
T
C
_XI
N
T
X2
Schematic design notice of "52_CONNECTIVITY_GPS_MT2523G" page.
Note 52-1:
AVSS43_DCV should be connected to C5218 GND net first,
Note 52-3:
Both of pin AVDD43_VBAT and AVDD43_DCV voltage should be keeped
C5214 is close to G1 ball (AVDD28_TLDO)
Note 52-2:
Buck Mode : L5202 = 1uH, R5205 = 0 ohm , R5206 = NC
Note 52-4:
Note 52-5: Recommend to select 3V coin battery for leakage consideration.
Note: 52-1
Note: 52-1
Note: 52-2
Note: 52-3
Note: 52-4
Note: 52-5
U5204/C5221/C5222 could be removed, R5210 = 0 ohm,
Note 52-6:
Note: 52-6
Note: 52-7
Note 52-7: VTCXO voltage selection
Note 52-8: RF clock selection
Note: 52-9
IO Voltage Selection
Note 52-9:
Host interface selection
Note 52-10:
Note: 52-10
Note: 52-12
Note: 52-11
Note 52-11:C5201 is close to U5201 VCC
50 Ohm
Carkit_input
Note: 52-15
Note: 52-13
RTC XTAL
TCXO layout please refer to MTK TCXO layout rule.
In order to keep good GPS clock stability,
Note 52-12:
Note 52-15:
Note 52-14:Main Input Voltage Requirement and External LDOs Selection
output voltage drop-down period.
discharge function and confirm the voltage drop-down curve to keep long
[1] Please choose one voltage source without built-in output high-speed
GPS_VTCXO_SW Note for external active antenna,
Note 52-16:
matching value depends on LNA selected
GPS_VTCXO_SW is 1.8V or 2.8V base on TCXO selection.
The voltage drop must can't be lower than 3.1V.
output voltage drop-down period (>1ms from 2.7V to 0.5V).
function, such as Torex XC6210/XC6215/XC6221 series to keep long
[2] Please choose external LDOs without output high-speed discharge
C5203, C5206 and L5201 are reserved for LNA matching
Note 52-13:
Otherwise, please using external power supply.
Please ensure external active antenna is operating at this range.
Please refer the QVL to select LNA component
Note 52-17:
the QVL to select TCXO component
MT2523 support 16.368MHz&26MHz TCXO, please refer
Note: 52-17
Note: 52-16
GPS_D
C
V_1
V8
GPS_DCV_1V8
GPS_CORE1V1
GPS_VTLDO_2V8
C5218
C / 4.7 / uF / 0603
2
1
TP5205
NC
1
L5203
L / 22 / nH / 0402 / NC
1
2
C5216
C / 1 / uF / 0402
2
1
R5211
R / 1 / K / 0402 / NC
TP5201
NC
1
C5224
C / 4.7 / uF / 0603
2
1
R5235
R / 0 / ohm / 0402
1
2
TP5207
NC
1
TP5210
NC
1
C5214
C / 1 / uF / 0402
2
1
R5241
R / 0 / ohm / 0402
1
2
C5237
C / 4.7 / uF / 0603
2
1
TP5215
NC
1
C5226
C / 1 / uF / 0402
2
1
U5205
U / XC6210A332MR
IN
1
GND
2
EN
3
BYP
4
OUT
5
C5233
C / 0402 / NC
2
1
U5207
U / BGA725L6
GND
1
VCC
2
AO
3
GNDRF
4
AI
5
PON
6
+
BAT5201
ML621S / NC
R5237
R / 0 / ohm / 0402
1
2
R5230
R / 0 / ohm / 0402
1
2
R5238
R / 0 / ohm / 0402
1
2
T
P
52
03 NC
1
X5204
X / FC-135 32.768KHZ 12.5pF
IN1
1
IN2
2
C5219
C / 4.7 / uF / 0603
2
1
C5236
C / 18 / pF / 0402
2
1
L5202
L / 1 / uH / 0806
L/IND/SMD/LQM2MPN1R0NG0
R
520
7
R
/
1
0
/
K
/
0
402
/
N
C
C5229
C / 18 / pF / 0402
2
1
C
522
1
C
/
2
2
/
pF
/
0
40
2
R5210
R / 120 / K / 0402 / NC
1
2
C5227
C / 22 / pF / 0402
2
1
J5202
R / 0 / ohm / 0402-3P(1-2)
1
2
3
R5206
R / 0 / ohm / 0402 / NC
R5236
R / 0 / ohm / 0402
1
2
R5203
R / 10 / K / 0402 / NC
C5209
C / 4.7 / nF / 0402
2
1
R
520
9
R
/
1
0
/
K
/
0
402
/
N
C
C5211 C / 1 / uF / 0402
2
1
L5204
L / 5.6 / nH / 0402
1
2
TP5214
NC
1
R5219
R / 0 / ohm / 0402
1
2
C5210 C / 1 / uF / 0402
2
1
U5203
U / XC6210A332MR
IN
1
GND
2
EN
3
BYP
4
OUT
5
J5201
R / 0 / ohm / 0402-3P(1-2)
1
2
3
TP5206
NC
1
C5213 C / 4.7 / nF / 0402
2
1
C5232
C / 0402 / NC
2
1
T
P
52
04
NC
1
C5235
C / 0402 / NC
2
1
TP5216
NC
1
C5234
C / 0402 / NC
2
1
C5207
C / 1 / nF / 0402
1
2
R5218
R / 0 / ohm / 0402 / NC
1
2
R5217
R / 0 / ohm / 0402 / NC
1
2
C
522
2
C
/
2
2
/
pF
/
0
40
2
TP5213
NC
1
C5203
NC
1
2
C5238
C / 4.7 / uF / 0603
2
1
VGPS_MAIN
R5216
R / 0 / ohm / 0402
1
2
C5212 C / 2.2 / uF / 0402
2
1
TP5211
NC
1
R5240
R / 0 / ohm / 0402
1
2
R
522
6
R
/
0
/
oh
m
/
0
40
2
R5205
R / 0 / ohm / 0402
C5201
C / 1 / uF / 0402
2
1
GPS_DCV_1V8
R
520
8
R
/
1
0
/
K
/
0
402
R
522
5
R
/
0
/
oh
m
/
0
40
2
U5206
U / EPOCOS_B8313
IN
1
G
2
G
3
OUT
4
G
5
R5220
R / 91 / K / 0402 / NC
1
2
R5228
R / 0 / ohm / 0402
1
2
R5204
R / 10 / K / 0402 / NC
R5232
R / 0 / ohm / 0402
1
2
TP5208
NC
1
T
P
52
02
NC
1
R5239
R / 0 / ohm / 0402
1
2
C5215
C / 1 / uF / 0402
2
1
R5201
R / 0 / ohm / 0402
R5234
R / 0 / ohm / 0402
1
2
C5230
C / 0402 / NC
2
1
U5208
U / EPOCOS_B8313
IN
1
G
2
G
3
OUT
4
G
5
C5208
C / 4.7 / nF / 0402
2
1
TP5209
NC
1
TX2
R5227
R / 0 / ohm / 0402
1
2
C5220
C / 1 / uF / 0402
2
1
MT2523G
U1000-4
MT2523G
GPS_3
2K_OU
T
E
17
GPS_AVD
D
43_
R
T
C
D
19
GPS_AVD
D
11_
R
T
C
F
21
GPS_XI
N
K
21
GPS_XOU
T
K
22
GPS_T
X0
M
16
GPS_R
X0
M
18
GPS_T
X1
E
16
GPS_R
X1
G
20
GPS_T
X2
J18
GPS_R
X2
L18
GPS_SC
K1
K
17
GPS_SC
S1
_
P
17
GPS_VREF
H22
GPS_AVDD_TCXO_SW
F22
GPS_AVDD28_TLDO
E22
GPS_AVSS43_MISC
G21
GPS_AVDD28_CLDO
D22
GPS_AVDD11_CLDO
B22
GPS_AVSS11_CLDO
C22
GPS_AVDD43_DCV
B21
GPS_AVSS43_DCV
A21
GPS_DCV
C21
GPS_DCV_FB
C20
GPS_HRST_B
M21
GPS_XTEST
M19
GPS_EINT0
N19
GPS_EINT1
N20
GPS_DVDD11_CORE2
L19
GPS_DVDD11_CORE1
G18
GPS_DVSS28_IO
J17
GPS_DVDD28_IO1
H20
GPS_DVDD28_IO2
P20
GPS_DVDD28_SF
J20
GPS_JRCK
L17
GPS_JDO
P18
GPS_JDI
K16
GPS_JCK
G19
GPS_JMS
N18
GPS_JRST_
N17
GPS_R
F
IN
N
22
GPS_AVD
D
18_
R
XF
E
M
22
GPS_T
1P
L20
GPS_OSC
F
20
GPS_AVD
D
18_
C
M
L22
GPS_T
1N
L21
GPS_AVDD43_VBAT
G22
GPS_F
OR
C
E_ON
D
20
GPS_D
VSS11_
C
OR
E
J16
GPS_D
VSS11_
C
OR
E
F
17
GPS_D
VSS11_
C
OR
E
F
16
GPS_D
VSS11_
C
OR
E
F
18
GPS_D
VSS11_
C
OR
E
G
16
GPS_D
VSS11_
C
OR
E
G
17
GPS_D
VSS11_
C
OR
E
H
16
GPS_D
VSS11_
C
OR
E
H
17
GPS_D
VSS11_
C
OR
E
C
19
GPS_AVSS_R
F
P
21
GPS_DVSS28_SF
J21
C5223
C / 2.2 / uF / 0402
2
1
L5201
L / 1.2 / nH / 0402
TP5212
NC
1
C5231
C / 1 / uF / 0402
2
1
TCXO5201
TCXO / 26 / MHz
VCC
4
OUT
3
GND
2
NC
1
C5206
C / 1 / pF / 0402
C5217
C / 1 / uF / 0402
2
1
C5225
C / 4.7 / uF / 0603
2
1
GPS_VANT
GNSS_VBAT
GNSS_VBAT
GPS_VTCXO_SW
GPS_32K_BB
[10]
GPS_LDO_EN
[10]
GPS_diplexer_input
[50]
U
R
XD
3_
GPS
[1
0]
U
T
XD
3_GPS
[1
0]
between 3.1V to 4.3V (VGPS_MAIN)
VGPS_MAIN
then connect to reference GND.
LDO Mode : L5202 = 0 ohm , R5205 = NC , R5206 = 0 ohm
Pin GPS_VRTC_4V3 should be provided between 2.0V to 4.3V.
GPS_VRTC_4V3 should be kept (always alive voltage source).
Or change C5220 to 0 ohm and feed 1.1V (always alive voltage
source) into GPS_VRTC_1V1.
2.8V TCXO: TLDO 2.8V : R5209 = NC
1.8V TCXO: SMPS 1.8V : R5209 = 10K
16.368MHZ TCXO : R5207 = NC , R5208 = NC
26MHZ TCXO : R5207 = NC , R5208 = 10K
2.8V IO : R5201= 0 , R5202 = NC (IO voltage is GPS_VTLDO)
1.8V IO : R5201 = NC , R5202 = 0 (IO voltage is GPS_DCV_1V8)
UART : R5203 = NC , R5204 = NC (I/F : TX0 , RX0)
SPI : R5203 = NC , R5204 = 10K
I2C : R5203 = 10K , R5204 = 10K
GPS_CORE1V1
GPS_DCV_1V8
GPS_EI
N
T
[1
0]
R
524
2
R
/
0
/
oh
m
/
0
40
2
1
2
GPS_VANT
GPS_VTLDO_2V8
GPS_VTCXO_SW
VGPS_MAIN
TX2